He was an early injury casualty, pulled out of Wednesday's game in the Thai capital just before kick-off.

But Mourinho said: "It was a precaution. He was feeling discomfort on his Achilles, so we decided he wouldn't play.

"I always say the players have to be intelligent in this period. No risks. If they feel a little thing, don't play.

"In competition you have to risk something. In pre-season, the worst thing that can happen is an injury while taking a risk. Frank will rest like everyone tomorrow and in two days' time he'll be back in training."